P0733 Chevrolet Code - Transmission 3rd Gear Ratio Incorrect
Quick Answer
The transmission turbine speed sensor and vehicle speed sensor are hall-effect sensors. Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0733 Chevrolet indicates Transmission 3rd Gear Ratio Incorrect.
- Common causes
- Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0733 Chevrolet Description
The TCM provides a 9 V reference circuit and a signal circuit to each of the sensors. As the 1-2-3-4-5-6 clutch piston housing and transmission output shaft or transfer case output rotates, the sensors produce a signal frequency based on the teeth on the reluctor wheel. The TCM calculates the transmission gear ratio based on the speed sensor signals and compares the calculated gear ratio to the commanded gear ratio.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the calculated gear ratio with 3rd gear commanded differs from the known 6th gear ratio for 2 s.
What are the Possible Causes of the DTC P0733 Chevrolet?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0733 Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0733 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Chevrolet Models
- P0733 2014 Chevrolet Silverado — Transmission 3rd Gear Ratio Incorrect
- P0733 2015 Chevrolet Silverado — Transmission 3rd Gear Ratio Incorrect
- P0733 2016 Chevrolet Silverado — Transmission 3rd Gear Ratio Incorrect
- P0733 2017 Chevrolet Silverado — Transmission 3rd Gear Ratio Incorrect
- P0733 2018 Chevrolet Silverado — Transmission 3rd Gear Ratio Incorrect
Frequently Asked Questions about P0733 Chevrolet Code
1. What does OBDII code P0733 mean for a Chevrolet?
P0733 indicates that the transmission's third gear ratio is incorrect, meaning the gear isn't achieving the expected RPM or speed ratio during operation.
2. What are the common symptoms of P0733 on a Chevrolet?
Symptoms can include difficulty shifting gears, slipping in third gear, reduced acceleration, and the check engine light turning on.
3. What causes the P0733 code to appear on a Chevrolet?
Common causes include low transmission fluid, worn clutch packs, a faulty shift solenoid, damaged transmission bands, or internal transmission failures.
4. Can driving with P0733 damage my Chevrolet's transmission?
Yes, driving with this code can cause further damage to the transmission if the issue is not addressed promptly.
5. How can I fix the P0733 code on my Chevrolet?
Repairs may involve checking and refilling transmission fluid, replacing faulty solenoids, repairing internal transmission components, or performing a complete transmission rebuild.
6. How do I diagnose P0733 on a Chevrolet?
Diagnosis typically includes scanning for codes, checking the transmission fluid level and condition, inspecting the shift solenoids, and testing the transmission's internal components.
7. Can low transmission fluid cause P0733 on a Chevrolet?
Yes, low or contaminated transmission fluid can lead to incorrect gear ratios and trigger the P0733 code.
8. How much does it cost to repair P0733 on a Chevrolet?
The cost varies depending on the cause, ranging from $150 for fluid replacement to several thousand dollars for a full transmission rebuild.
9. Will clearing the P0733 code fix the issue on my Chevrolet?
Clearing the code may turn off the check engine light temporarily, but the underlying problem must be repaired to prevent the code from returning.
10. Is a software update ever needed for P0733 on a Chevrolet?
In rare cases, a transmission control module (TCM) software update may resolve the issue if incorrect programming is contributing to the problem.
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